Fix/Add DJM-750MK2/DJM900-NX2 SEND/RETURN TO TRAKTOR PRO

Hi Pioneer team. Please for this feature:
I found same usability with DJM-V10 mix here
https://support.pioneerdj.com/hc/en-us/articles/4413486063897-How-to-use-TRAKTOR-Pro-3-effects-with-DJM-V10-

But it doesn't work on DJM-750MK2/DJM900-NX2. (It's not possible to activate the SEND signal to send the audio channel, this channel exists on the PC/MAC and can already be mapped in Traktor PRO, but since no signal goes to it it's a very strange dead end and looks like a bug in the mix firmware).

Yes, I know this feature was designed for the ipad/iphone effect app, but I don't want to have more devices on stage than necessary. One computer/mac is plenty enough.

Thank you pioneer.